Miner&#39;s drill-holder



0. DEVENISH.

MINERS DRILL HOLDER.

APPLICATION FILED APR.24, I920.

Patented July 26, 1921.

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4Z4 ,2? 24 yi INVENTOR 62/35 @kerflezen alal w B'Y Vi W 6 ATTORNEY I UNITED STATES PATENT OFFICE.

CHRISTOPHER DEVENISH, 0F BOSSBUBG, WASHINGTON.

MINERS DRILL-HOLDER.

17 0 all whom it may concern:

Be it known that I, CHRISTOPHER DEVEN- rsrr, a citizen of the United States, residin at Bossburg, in the county of Stevensand State of Washington, have invented new and useful Improvements in Miners Drill- Holders, of which the following is a specification. i

The object of this invention is to provide a device for holding miners drills during the sharpening operation thereof. I

A miner has a set of working drills all of the same diameter but of different lengths. These drills are successively used in the operation of drilling to different depths and all of the drills of'a set are of the same shank diameterso that they will lit a single power machine. ends of miners drills aresharpened by first heating the same, or rather the drilling ends thereof, and then applying to said drilling ends a sharpening die to the latter of which hammering blows are applied which exert an endwise thrust on the drill. Because of the fact that the drills are sharpened a good many times during their lives they'become somewhat shortened in length with respect to their initial length when new. Thus the proposition of devising an eflicient holder for drills of this character involves the problem of not only accommodating the device to a set of drills of a rather wide range of initial length, but'also taking into ac-' supported against the longitudinal thrust from the hammer sharpening blows, and irrespective of the variation of length of the 3 drill, the means forholding or'stabilizing the drill shank near the drilling end must always be below said end.

It is one of the features of my invention screws 6 and the same is shown as being provided with a socket 7 of a predetermined to provide mechanism which may be lengthened or shortened in accordance withv the length of drill to be sharpened, said mechanism preferably being divided into supporting units, two or more ofwhich may be disposed in superimposed relation with re- I porting unitsls indicated at 9, 10, 11 and 12,

spect to each {other zor-on'e of'which may be superimposed upon the base of the device in such' a manner that irrespective of Specification of Letters Patent.

The drilling:

Patented July 26', 1921.

Application filed April 24, 1920, Serial No. 376,342.

the height of the supporting units employed, the hammering thrust will be transmitted lengthwise thereof to the supporting base.

A further feature consists in employing individual supporting units: which are movably mounted in such a manner that they can be selectively adjusted into and out of superimposed relation to the base and each other for the purpose of sustaining the particular length of drill to be sharpened.

A further feature consists in providing the supporting units or drill supporters with interlocking parts so that they will be held in vertical alined relation after they have been adjusted into an operative position. a r

The invention has many other objects and features which will be more fully described in connection with the accompanying drawing and which -will be more particularly pointed out in and by the appended claims.

In the drawing:

Figure 1 is a view in side elevation, with parts in section, illustrating most improved form of my invention.

Fig. 2 is a sectional view on line 2-2 of Fig. 1.

Fig. 3 is a view looking in the direction of the arrow of Fig. 1.

Like characters of reference designate similar parts throughout the different figures of the drawing.

As illustrated, 1 designates a supporting base on which is mounted an upright 2. A shank holder 3 is secured to the upper end of the upright 2, as shown. For a purpose which will later appear, the base 1 is provided with an anvil portion L which is preferably removably mounted in a socketed por- 1 tion 5 of the base 1, not only for purposes of facll tating removal and renewal of the anvil portion but also to avoid making the entire base 1 of a material suitable for the anvil 4.. The anvil 4: may be secured by depth below the upper surface 8, or rather 1 that portion thereof immediately surrounding the socket 7 A plurality of drill supporters or supquirements without in any way affecting the manner of their operation or my invention. As shown, each supporter is provided on its upper end with a socket as indicated at 13 to 16. The lower end of each unit terminates and is reduced to form tenons as indicated at 17 to 20, the tenon of one unit fitting into the socket of the next lower adjacent unit, except inthe case of the lowermostunit 9 whose tenon 17 fits into the socket 7 of the anvil 4. The upper socket 16, or in any event the. socket of the uppermost unit, will function to receive the lower end of the shank 21 of the drill and it is a feature of my invention to proportion these sockets to receive the end of the drill shank. Thus it will be seen that the tenons and sockets serve to lock the units 9 to 12 in their alined and superimposed relation so that they will function much the same as an integral rod in transmitting the hammering stresses direct to the anvil 4.

Reference will next. be made to the specific manner shown whereby the supporting units may be adjusted selectively into and out of operative positions. The units have arms22 to 25, preferably rigidly secured thereto. The remaining ends of the arms are pivoted at 26 to 29 to collars 30 to 33, all of which are identical in form and'operation and. only one of which need. be described in detail. I prefer to form these collars of a strip of metal the ends 34 of which are held in spaced relation by a spacing block 35. to

which the ends are secured.- The upright 2 is recessed at 37 so'that the strap will encircle the upright between opposing shoulders. Thearms extend betweenthe free ends 34 and a stop'pin 38 serves to limit downward movement of the arms beyond the horizontal position shown so that when the arms are.

uponthe arms nor upon their collar connection withthe upright 2.

The holder 3 has arecess 39 into which the shank 21seats or is inserted. A retainer 40,

length of this drillhas been reduced by re-- peated sharpening operations, ,the parts are j so proportioned thatthe holder 3 will. always be well below the drilling 'end44. Proportionately, the remainder of the units are likewise arranged for drillsv of successivelygreater length. No strain is imposed upon' the holder 3 and the latter functions primarily to stabilize the upper end ofthe drill.

The preferred operative use of my improved device may be described as follows Assuming that a set of miners drills comprised four drills, then the user would start with the longest drill to be sharpened and would swing, aside units12, 11 and 10 after the manner shown in Fig. 2, thereby leaving the socket 13v free to receivethelower end ofsuch longest drill. The drilling end thereof would be inserted in the holder 3 as shown: in Fig. 1. Ofcourse the drilling-end would be. first heated. Then the 'die is placed upon the drilling endand a succession of hammer blowswill serve to sharpen said end, all of the hammering thrust. being transmitted through the unit 9:to thfe anvil 4 and base 1. After. sharpening the longest drill the next unit 10 willbeswung intoposition, the same being lifted slightly to insert its-tenon 18'into'the socket 13. This operation will. continue downto theshortest drill. If desired, the socket 7 in the anvil 4 may. be utilized for the longest drill therebyv reducing the number of. unitsper set of drills, by'one unit. 7

These hammering blows :are notexc eptionally heavy and of course they areimparted cannot buckle-and willrtoall intents and purposesact as a single rod. Thus itpwillbe seen. that these unitsmay be broadly termed a mechanism which may be lengthenedv or shortened to accommodateminers drills of differentlengths. I

It, is. believed thatmy. invention will be fully understood from the. foregoing description, and'whilel haveherein shown and described. one specific form. of myinvention, I do notv wish to belimited thereto except for,- such limitations as the claims may impart.

I claim:

1. In a device for supporting miners drills of the same-diameter. andof different lengths for. sharpening purposes, a frame including abase, aholderon saidlframe for the :shank Y of the drill near the drilling endto be sharpened, and-.a-plurality of supporters for supporting the remaining ends of drillsv of different length and transmitting the'hammer sharpening thrust to the base, said supportere-being selectively. adjustable out of or into operative positi0n for supporting drills of different length.

2. .In a device for. supporting miners drills of the same. diameter and different lengths for shar ening purposes, a base,.and-a plu rality o. supporters for. selective super-im-v position'upon each other and thebase with.

the uppermost unit supporting the lower end of the drill to take the hammer sharpening thrust.

3. In a device for supporting miners drills of the same diameter and different lengths for sharpening purposes, a frame including a base and an upright, a holder on said upright for engaging the shank of the drill near the drilling end thereof, a plurality of arms, a collar pivoted to each arm and each collar being rotatively adjustable about said upright as an axis, a supporting unit secured to each arm and each supporting unit having a socket on its upper end and a tenon on its lower end for interlocking relation whereby the units may be selectively adjusted and locked into alined relation, said base having a socket for the tenon of the lowermost unit.

14. In a device for supporting miners drills of the same diameter and different lengths for sharpening purposes, a frame includin a base having a removable anvil provide with a socket, and a plurality of drill supporting units adapted to be selectively arranged in superimposed relation in greater or lesser number upon said anvil to accommodate drills of difl'erent lengths.

In testimony that I claim the foregoing V as my own I hereby afiix my signature.

CHRISTOPHER DEVEN'ISH. 

